List of The Best Seed Starting Mixes Worth Buying in 2021

Dirt Booster is an all-natural compost starter and soil amendment

Works much faster than traditional composting methods - Get rich garden compost in about 7 to 12 days

Increases and feeds the good microbes, bacteria and fungi in your soil to create ideal growing conditions that will last all season long

Dirt Booster and the included microbial pack contain biochar, humic acid, corn distillates, molasses and kelp

Do not plant directly in Dirt Booster super compost as this material will be very high in nutrients and doing so could result in burning. Instead, mix Dirt Booster compost into your garden.

🏺 PERFECT FOR POTTED PLANTS — Indoors and Outdoors, Containers Without Drain Holes

💞 NATURAL CONDITIONER — Reacts With Soil To Release Essential Nutrients

🎈 AERATES SOIL — Creates Space for Plant Roots to Expand and Grow

💧 BETTER DRAINAGE — Porosity of Vermiculite Allows Excess Water to Drain Away From Roots

🚫 DOES NOT BREAK DOWN — Lasts Longer in Potting Mixes Than Other Additives

SIZE: 38.6 quarts of FoxFarm Ocean Forest Potting Soil for your hungry plants

APPLICATION: Ultimate potting soil that has everything your plants need in one bag

CONTENTS: Blend of earthworm castings, bat guano, sea-going fish & crab meal, forest humus, moss & more

PH LEVELS: Ocean Forest is pH adjusted at 6.3 to 6.8 to allow for optimum fertilizer uptake

BENEFITS: Encourages strong branching and a sturdy, healthy growth habit and is ideal for containerized plantings

BLOCKS OR TRAYS! Whether you are starting your seeds in plastic trays or using a soil blocker, Seed Starter is the mix for you

READY-TO-USE! Purple Cow Seed Starter Mix is a blend containing everything needed to start seeds including enough fertility for up to 45 days

COMPOST BASED! This mix is created using our Activated Compost, a premium soil amendment with over 20 years of growing success

STURDY SEEDINGS! Promotes rapid germination and vigorous seedlings with strong root systems able to withstand transplanting and thrive

SMALLER BAG! Not planting as many seeds? Looking for a lighter bag to carry? This 12 quart bag is about half the size of our 1 cubic foot bag

Seed starter soil

Contains 6 components blended in proper proportions, lightweight, loose and fertile

Also useful for transplanting or root cuttings

Specially formulated soilless mix to promote superior germination of seeds

This product count 4 pounds

Screened and pre-washed mix. Optimal pH of 6.4

Available in bag sizes from 2 quart to 28 gallons.

Optimized for pH, water absorption, evaporation, bulk density and particle size.

Ready to use for the vast majority of bonsai trees including tropicals. Phone support available with each order.

Proven mix and professional supplier with more than a hundred thousand bags sold. Mix #221 is our number one selling bonsai soil. Phone support and advice is available with each order.

Excellent 100% biodegradable soil alternative mix

Made from coconut coir, a renewable resource made by recycling the husks from harvested coconuts

Provides a quality growing medium for all types of plants

Compressed brick expands to about 8 quarts in a few minutes just by adding water

OMRI listed for organic use

Sun Gro Seedling Mix 8qt Listed by the Organic Materials Review Institute for the production of organic food and fiber

This mix combines double screened Canadian Sphagnum Peat Moss and other fine ingredients to give seedlings the aeration and moisture retention they need for strong development

This product is made in United States

Listed by the organic materials review institute for the production of organic food and fiber

Combines double screened Canadian sphagnum peat moss and other fine ingredients to give seedlings the aeration and moisture retention they need for strong development

Contains Canadian sphagnum peat moss, perlite, dolomite lime, and an organic wetting agent

Use for germinating seeds in flats, pots, and plug trays

8-Quart

Espoma Ss16 16-Quart Organic Seed Starter Premium Potting Mix

Premium Potting Mix

Country Of Origin: United States

Brand Name: Espoma

Specially formulated for fast root development

Enriched with Miracle-Gro Plant Food

Excellent for starting cuttings

Use when starting from seed and with leaf, stem or root cuttings

For use in containers

Ideal for root growth in newly germinated seedlings

Contains organic wetting agent to ensure uniform water penetration

Enriched with Resilience for stronger stems and improved root mass

OMRI listed organic

1.5 cubic foot bag

An organic fertilizer featuring pure earthworm castings

Organic and odorless, the nutrients are perfectly balanced for immediate and long term absorption

Using only a small amount provides incredible results making this soil builder cost effective

Item Package Dimension: 24.1" L x 15.5" W x 4.5" H

Enriched with a specially formulated plant food that gradually releases nutrients for up to 9 months

Contains MYCOACTIVE to stimulate vigorous growth and greater resistance

Formulated with coco fiber that helps manage moisture levels and protects roots from rot

Use on vegetables, herbs, annuals and perennials

'Ready-to-use